I recently changed the heater core & the car.

Tiny
ANONYMOUS
  • MEMBER
  • 1995 GMC JIMMY
  • 160 MILES
I recently changed the heater core & the car puts. Out heat, but after a few seconds the vent door closes. I can hold the switch and force it to stay open, but I am afraid to damage something. Is there a part that may be replaced to allow the vent door to stay open while heater is on?
Thursday, November 15th, 2012 AT 5:02 PM

2 Replies

Tiny
JDL
  • EXPERT
Are you talking about the actuator for the dash?
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Thursday, November 15th, 2012 AT 5:27 PM
Tiny
JDL
  • EXPERT
Note the vacuum diagram for hvac. The actuator may be losing vacuum?
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Thursday, November 15th, 2012 AT 5:32 PM

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